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TT: Fachverband Tiefe Temperaturen
TT 65: Frustrated Magnets: General I
TT 65.8: Vortrag
Donnerstag, 21. März 2024, 11:30–11:45, H 2053
Magnetic properties and phase diagram of triangular-lattice antiferromagnet TlErSe2 — •Bastian Rubrecht1, Mirtha Pillaca2, Pritam Bhattacharyya1, Liviu Hozoi1, Dmitriy Efremov1, Ellen Häußler2, Thomas Doert2, and Anja Wolter-Giraud1 — 1Leibniz-Institut für Festkörper- und Werkstoffforschung (IFW), Dresden, Germany — 2Fakultät für Chemie und Lebensmittelchemie TU Dresden, Dresden, Germany,
The triangular-lattice (TL) antiferromagnet is a well-known case of strongly frustrated magnetism. Here, the delafossites, with the general chemical formula A+IRE+IIIX2 (A: alkaline/monovalent cation, RE: rare-earth cation and X: chalcogen anion), offer a rich platform for exploring exotic magnetic phases arising from the degenerate ground state manifold.
By introducing different elements at the A site and choosing the magnetic rare-earth ion, one can tune the anisotropy of the magnetic interactions as well as the single-ion anisotropy, two defining parameters for the system’s ground state.
In this study, we investigate TlErSe2, a novel material realizing an antiferromagnetically coupled effective spin-1/2 model on a TL. Our zero-field 3He specific heat studies revealed a phase transition at 0.42 K, which is successively suppressed with an increasing applied magnetic field. From magnetization and 3He specific heat measurements on a polycrystalline TlErSe2 sample, we construct the magnetic phase diagram and discuss the possible nature of the observed phases.
Keywords: Triangular-lattice antiferromagnet; Delafossite; Rare-earth magnet